Vibrator attachment for polishing-machines



(N0 Mod 1.) V

G J. B. BENNETT & A. P. BOARDMAN.

VIBRATOR ATTACHMENT FOR POLISHING MAGHINE$.

Nb. 441,633; Patented Dec. 2, 1890.

UNITED STATES JOSEPH B. BENNETT AND ANSON P. BOARDMAN, OF \VATERTOWN,ASSIGN- ORS, BY MESNE ASSIGNMENTS, TO THE BERLIN MACHINE WORKS, OF

BELOIT, IVISCONSIN.

VIBRATOR ATTACHMENT FOR POLISHING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 441,633, dated December2, 1890.

Application filed April 10 1889. Serial No. 306,667. (No model.)

To all whom it may concern.-

Be it known that we, JOSEPH B. BENNETT and ANSON P. BOARDMAN, ofWatertown, in the county of Jefferson and State of Wisconsin, haveinvented new and useful Improvements in Vibrator Attachments forPolishing-Machines; and we do hereby declare the following to be a full,clear, and exact description of said invention, reference being had tothe accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

The object of our invention is to provide means for producing areciprocal endwise or vibratory movement of the sand-paper-coveredcylinders of a polishing-machine.

In the drawings, Figure 1 is an elevation of a polishing-machine inwhich our newlyinvented device is embodied. Fig. 2 is an elevation of acylinder, part being broken away, in connection with a side elevation ofour newly-invented device for producing the vibratory movement of thecylinder. Fig. 3 is a top view or plan of the same newly-in- 2 5 venteddevice shown in Fig. 2. Fig. 4 is an inside elevation of' the device forproducing the vibratory motion of the cylinder, being the same deviceshown in Figs. 2 and 3, in connection with the shaft having eccentrics 0by which the bell-crank is tilted.

The same letters refer to like parts in all the views.

In the drawings, A is the frame of the machine, and B is an independenttop part of 3 5 the frame, having some vertical movement with referenceto the frame A. The cogwheels 0 C are rigid on the ends of shafts offeed-rollers, and the intermediate cog-wheels D D, meshing with thewheels 0 O, are adapt- 40 ed to communicate motion from the righthandcog-wheel O to the other cog-wheels O C, the right-hand cog-wheel 0being driven by power supplied through the cog-wheels E and E,respectively, which are driven by connection with other parts of themachinery. There are other feed-rollers located directly below therollers O O and having their bearings in the frame 'A, whichfeed-rollers are not shown in the drawings, as they form no part of theinvention.

The shafts F and F, connected by gearing. at their ends, are adapted forraising and lowering the top B, and have no connection with the deviceinvented by us, and hereinafter to be more specifically described.

The sandpaper-covered cylinders G G G, of which there are three in themachine shown in Fig. 1, are each supported on a shaft H, which shafthas bearings in the pillow-blocks I I in the frameA of the machine. Theshaft H is so constructed and supported in the pillow-blocks as to havean endwise movement therein as well as a rotary movement. To accomplishthe vibratory movement of these cylinders, bell-cranks L L-one oppositeeach shaft--are pivoted at their angles severally on the frame by a rodM, supported therein. The upper arm of each bell-crank is bifurcated,forming a yoke, within which is a movable collar N about the shaft H,which collar has Vertical lateral edges, and is provided with a recessin each lateral edge, in which is fitted a gib O, which gibs on eachside are held in place by the set-screws P P, .turning through the armsof the yoke of the bell-crank against the gibs O 0, respectively, aboutopposite to the center of the shaft H, whereby the box N, with the gibsO O, is pivoted in the yoke of the bell-crank arm in such manner thatthe reciprocal force which produces the vi- 8o bratory movement of thecylinders is delivered to the shaft opposite to the center of the shaft.A collar or shoulder K, rigid to the shaft H, bears against the box N onthe inside, and a collar or ring K, provided with a screw thread, turnson a screw-threaded split ring K on the shaft H, the collar K bearingloosely against the box N on its outside. The lower horizontal arm ofthe bell-crank L is also bifurcated, and a movable pillow-block 0 Rrests therein and is adapted to move therein out and in from and towardthe pivotal point of the bell-crank.

A horizontal shaft S, supported in bearings in the frame A, is out andreduced to an ecthe bell-crank L and raises and depresses this arm ofthe bell-crank, whereby the upper arm of the bell-crank is tiltedlaterally, by which means the shaft II and cylinder G thereon arereciprocated endwise, The shaft S is rotated by means of gearing with awheel U, driven by a belt running to the power-supplying mechanism. Thepillow-block R has a movable bar V for one side of the journal held upto the journal or released by the thumb-screw IV, and when released theshaft S may be inserted or removed from the pillow-block R. In themachine shown in Fig. 1 there are three cylinders G, and these arecaused to vibrate alternately by the construction of the shaft S, inwhich the eccentrics T TT are each in a difierent radius from the othersin the shaft S.

It will. be understood that the material to be polished is run throughthe machine from one end to the other between the upper and lowerfeed-rollers and above the polishingcylinders, so that the material ispolished by the rotary and vibratory movement of the cylinders combined.

hat we claim as new, and desire to secure by Letters Patent, is

1. In a polishing-machine, the combination, with a rotatingpolishing-cylinder supported and having endwise movement in the frame,of a tilting bell-crank pivoted at its angle on the frame, and arotating shaft having an cecentric, which eccentric bears against onearm of the bell-crank, whereby the crank is tilted as the eccentricrot-ates, the other arm of the crank being movably connected to theshaft of the cylinder, substantially as described.

2. In a polishing machine, the combination, with a polishing-cylinder ona shaft supported in hearings to have rotary and endwisc movement, of abell-crank pivoted on the frame of the machine, a movable box in one armof the bell-crank riding on the shaft of the cylinder between collars onthe shaft, a block in the other arm of the crank, and an eccentric 011 ashaft, on which eccentric the block rides and by the rotation of whicheccentric the bell-crank is tilted, substantially as described.

The combination, with the shaft of a cylinder of a polishing-machinesupported and adapted for endwise movement therein, of a tiltingbell-crank pivoted on the frame, a box riding on the cylinder-shaftbetween collars thereon, and a pair of gibs adapted for ways on whichthe box about the shaft travels, the gibs and box being securedpivotally to the arm of the bell-crank, substantially as described.

4. In a polishing-machine, a bell-crank piv oted on the frame, one armof which bellcrank straddles the shaft of a cylinder between collarsthereon, so as to move the shaft endwise when the bell-crank is tilted,in combination with a shaft having an eccentric and a movablepillow-block in which the eccentric has bearings, the pillow-block beingfitted and traveling in Ways in the other arm of the bell-crank,substantially as described.

5. In a polishing-machine, the combination of severalpolishing-cylinders supported to be capable of endwise movement therein,with tilting bell-cranks, one crank opposite each cylinder pivoted onthe frame, and a rotating shaft having several eccentrics, one for eachbell-crank, and on which one arm of each bell-crank rides, substantiallyasidescribed.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOSEPH B. BENNETT. ANSON P. BOARDMAN. Witnesses:

C. B. SKINNER, Gno. IIAW'KINS.

